/* Copyright  (c) 2002 Graz University of Technology. All rights reserved.
 *
 * Redistribution and use in  source and binary forms, with or without 
 * modification, are permitted  provided that the following conditions are met:
 *
 * 1. Redistributions of  source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in  binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *  
 * 3. The end-user documentation included with the redistribution, if any, must
 *    include the following acknowledgment:
 * 
 *    "This product includes software developed by IAIK of Graz University of
 *     Technology."
 * 
 *    Alternately, this acknowledgment may appear in the software itself, if 
 *    and wherever such third-party acknowledgments normally appear.
 *  
 * 4. The names "Graz University of Technology" and "IAIK of Graz University of
 *    Technology" must not be used to endorse or promote products derived from 
 *    this software without prior written permission.
 *  
 * 5. Products derived from this software may not be called 
 *    "IAIK PKCS Wrapper", nor may "IAIK" appear in their name, without prior 
 *    written permission of Graz University of Technology.
 *  
 *  THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 *  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 *  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE LICENSOR BE
 *  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
 *  OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 *  OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 *  POSSIBILITY  OF SUCH DAMAGE.
 */

package demo.pkcs.pkcs11;

import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;

import iaik.pkcs.pkcs11.Module;
import iaik.pkcs.pkcs11.Session;
import iaik.pkcs.pkcs11.Token;
import iaik.pkcs.pkcs11.TokenInfo;
import iaik.pkcs.pkcs11.objects.Data;



/**
 * This demo program can be used to download data to the card.
 *
 * @author <a href="mailto:Karl.Scheibelhofer@iaik.at"> Karl Scheibelhofer </a>
 * @version 0.1
 * @invariants
 */
public class DownloadData {

  static BufferedReader input_;

  static PrintWriter output_;

  static {
    try {
      //output_ = new PrintWriter(new FileWriter("SignAndVerify_output.txt"), true);
      output_ = new PrintWriter(System.out, true);
      input_ = new BufferedReader(new InputStreamReader(System.in));
    } catch (Throwable thr) {
      thr.printStackTrace();
      output_ = new PrintWriter(System.out, true);
      input_ = new BufferedReader(new InputStreamReader(System.in));
   }
  }

  public static void main(String[] args) {
    if (args.length != 3) {
      printUsage();
      System.exit(1);
    }

    try {

        Module pkcs11Module = Module.getInstance(args[0]);
        pkcs11Module.initialize(null);

        Token token = Util.selectToken(pkcs11Module, output_, input_);
        if (token == null) {
          output_.println("We have no token to proceed. Finished.");
          output_.flush();
          System.exit(0);
        }
        TokenInfo tokenInfo = token.getTokenInfo();

        output_.println("################################################################################");
        output_.println("Information of Token:");
        output_.println(tokenInfo);
        output_.println("################################################################################");

        output_.println("################################################################################");
        output_.println("Reading data from: " + args[1]);
        InputStream dataInputStream = new FileInputStream(args[1]);
        ByteArrayOutputStream bufferStream = new ByteArrayOutputStream(256);

        // read the data from the file
        byte[] buffer = new byte[4096];
        int bytesRead;
        while ((bytesRead = dataInputStream.read(buffer)) >= 0) {
          bufferStream.write(buffer, 0, bytesRead);
        }
        dataInputStream.close();
        
        byte[] data = bufferStream.toByteArray();
        output_.println("################################################################################");

        // open an read-write user session
        Session session = Util.openAuthorizedSession(token, Token.SessionReadWriteBehavior.RW_SESSION, output_, input_);

        output_.println("################################################################################");
        output_.println("creating data object on the card... ");
        output_.flush();

        // create certificate object template
        Data dataObjectTemplate = new Data();
        
        // we could also set the name that manages this data object
        //dataObjectTemplate.getApplication().setCharArrayValue("Application Name");
        
        // set the data object's label
        dataObjectTemplate.getLabel().setCharArrayValue(args[2].toCharArray());

        // set the object's data content
        dataObjectTemplate.getValue().setByteArrayValue(data);
        
        // ensure that it is stored on the token and not just in this session
        dataObjectTemplate.getToken().setBooleanValue(Boolean.TRUE);

        // print template
        output_.println(dataObjectTemplate);
        
        // create object
        session.createObject(dataObjectTemplate);

        output_.println("################################################################################");

        session.closeSession();
        pkcs11Module.finalize(null);

    } catch (Throwable thr) {
      thr.printStackTrace();
    }
  }

  public static void printUsage() {
    output_.println("Usage: DownloadData <PKCS#11 module> <data file> <data object label>");
    output_.println(" e.g.: DownloadData gclib.dll data.dat \"Student Data\"");
    output_.println("The given DLL must be in the search path of the system.");
  }

}